【判断题】【消耗次数：1】
幼儿园紫外线消毒的时间应不超过半小时。（）
①
正确
②
错误
参考答案：
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相关题目
【单选题】
使用紫外线灯消毒时紫外线强度不低于（）
①
50μW/cm<sup>2</sup>
②
60μW/cm<sup>2</sup>
③
70μW/cm<sup>2</sup>
④
80μW/cm<sup>2</sup>
【单选题】
关于紫外线灯消毒，不正确的是
①
紫外线杀菌灯GB19258-2012
②
定期检测性能、完整记录，累积使用不超过规定时限
③
用于物体表面消毒，照射1米距离，避免遮挡
④
用于空气消毒，平均每平米不少于1.5w
⑤
用于物体表面和空气消毒，作用时间10min
随机题目
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The footballer made a (n) _____ gesture, which made the audience’s blood boil.
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mature
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offering
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offensive
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hesitative
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When traveling, you are advised to take travelers’ checks, which provide a secure _____ tocarrying your money in cash.
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preference
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selection
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choice
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alternative
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She was protesting against ______ government telling students what they should and should not eat at school.
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bossy
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patient
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kind
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fragile
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Why not join us in baseball?____________
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Ok. I’m coming.
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You do the same.
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Don’t mention it.
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That’s alright.
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The sports meeting was put off till the next week ______ rain.
①
in spite of
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so
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because
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because of
【单选题】
I have the complacent feeling ______ I’m highly intelligent.
①
what
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which
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that
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this
【单选题】
It was not until he arrived in class _____ realized he had forgotten his book.
①
when he
②
that he
③
and he
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he
【判断题】
判断线上的内容是否正确：The teachers tried to __convince____ these students that they could solve the complicated problem, however, they just didn’t see the point.
①
正确
②
错误
【判断题】
判断线上的内容是否正确：For ten years the Greeks ___surrounded___ the city of Troy to separate it from the outside.
①
正确
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错误